Type-writing machine.



W. L. GUMPR-ECHT. TYPE WRITING MACHINE. APPLICATION FILED MAR. 19, 19,13.

fatented June 23, 1914.

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W. L. GUMPREGHT. TYPE WRITING MACHINE'. P APPLICATION FILED MAR.19, 1913. L ,O'?0 Patented June 23, 1914.

2 SHEETS-SHEET 2.

` vcorrespond UNITED STATES FFQE.

WILLIAM L. GUMPRECHT. or New YORK, N. Y., AssrGNon To JOHN THOMAS UNDERWOOD, or BRCOKLYN, NEW .YORK

TYrnwnrmNGMAcHiNn.

Specification of Letters Patent.

Be it known that l.' fuman ll. Giiiiliincii'r., a subject of the King o l': Great, lrit- L ain. residing in Brooklyn. in the county ot' i Kings. eitv and State oi New York, ha ve iiii vented the. followingis a specilication'.

My invention relates to mechanism in a iront-strike typewritiiie' machine, by which a ribbon is `vihrated to cover and uncover th(` printing point at every type stroke. and is ot' special value when used with a ribbon com prising a plurality oi color bands or stripes. l'ii biehronie ribbons. the. color bands are narrow. and do not permit of much latitude in the position oi the ribbon over the print.- ing point. The rapid movement of the vibrator is apt to result in an overthrow ot the ribbon.

.\n object ot the present. invention is to provide simple stop mechanism which Jforms positive means to prevent overthrow ot the ribbon vibrator.

rlhe invention is illustrated in connection with ribbon-vibrating mech anism oi' a frontstiike Underwood typewritine' machine. The type bars actuate universal bar which carries an actuator tor a. ribbonvibrating lever. The. lever has pins at different distances from its tiilcruiii. each adapted to engage a vertical slot in the actuator: the latter being;` shi'ltable' to connect. either pin with theaetiiator to var v the throw of the ribbon. stop device on the vibrator lever contacts with a dog or stop on the universal bar each time a type is brought to printing position, thereby positively limiting theupward throw ot' th'.` vibrator at all ot the four printing positions oi the latter. The stop device com'- prises tour stops or shoulders, positioned to to the four different positions of the lever relatively to the universal bar when a type bar is in printing position, these positiens depending on whether the platen is in upper or lower case position. and whether 1 the vibrator is adjusted for the upper or lower color band of the ribbon. The stop on the universal bar is pivoted to prevent the stops trom accidentally interlocking.

Other objects of the invention will appear hereinafter.

T-n the accompanying drawings. Figure '1 is a sectional' elevation certain new and iiset'ul linprove. ments in 'l`ype\Vritin;1` Machines. of which i l shows the lower color l i l l l l l l l l l l l l i view of an Undertion applied thereto.

.Patentedlune23, 191e.

SerialNo. 755,328.

l wood typewriting' machine with my inven- Fig. :2 is a perspective view ol the ribbon-vihrating`mechanisms Fins. :l to tr are sectional' elevation views of the saine. Fig. i), shows a type bar in printing position with the upper color band of the ribbon over the printing point. Fig. 4l

tion.

Figs. 5

and 6 show the platen shifted to upper ease position, and the upper and lower color bands respectively over the piantinepoint. Figf is aii enlarged detail t view o'l the vibrator lever.

Keys 1 are connected to levers 2 which 0perate 'type bars il mounted on a pivot, rod t and adapted to be swung upward to printing position in .front ot the platen 5. The. platen is mounted in a iframe 6 pivoted at T to a carriage 8 having a sliding connection with a rail 9 xed to the machine frame 10. The platen traine carries a roller 11 which runs on a shift rail 12 shittable up and down h v means ot a bell crank 13 operated by a. shift lever 11i. to the trent end of which is attached a shift key 15. The eed of the carriage in letter-space direction is controlled bv a rack 16. pinion 17 eseapement wheel 1 8. and eseapeinent dogs 19 operated and controlled as usual by a universal bar 20. The universal bar 20 has a pivotal connection 21 with rock arms QQ tulerumed at 9.3. A ribbon vibrator 2.4 has a pivotal connection 25 with the Jforward end of a vibrator lever 26 pivoted at 27 to a bracket 28 fixed to the shift rail 12. Pins 29 and 30, extending' from opposite sides of the vibrator lever and at different distances from its pivot 2T to vary the throw of the vibrator. are adapt.- ed to enter respectively vert-ical slots 31 and 32 in forwardly extendingt wings Jformed on the actuator 33. The actuator has a slidalole connection with an upright plate 34 secured to the universal bar20. i

The invention is particularly adapted for use with a bichroin` ribbon comprising up per and lower color strips or zones 35 and 3G. which may be black and red respectively. or any other desired colors. The throw oi`- the vibrator or its amplitude ot vibration is controlled by shiftkeys 37 and 38 on a. lever 39 at the forward end of a'roek shaft 40, to the rear end of which is secured an arm 41 pivoted to a link 42 connected to the actuator When t e key 37 is depressed the band in printing posi-A esV actuator is moved to the right to project the pin 29 into the slot 31. With the parts in this position, the lower color bandvwill be brought toprinting position when the type bars yare actuated. YVhen the' actuator is shifted to the left by depressing the key 38, the pin 30, which is farther from the fulcruin 27 than the pinv 29, enters the slot 32 and causes a shorter throw. ofthe vibrator, so that the upper Acolor band isbrought into operative position. Each type bar is 'formed with heel lein position to move the uni ,versal bar rearwardly as the type'bar moves to printing' positiomand thereby actuate the ribbon. vibrator and the escapement mechanism in the usual manner. l In order to positively limit. the upward movement of the ribbon and 4:6 are carried 26 and the universal f these devices and@ may vbe carried reby the' vibrator lever spectively by the universal bar and vibratorI der or stop a contacts Ywith the dog 46,'

thereby forming a positive stop for the vi- 4o brator and preventlng'the ribbon from be-i in carried above its normal position. "ifi/"ith-sy out this stop any play at the pivot 27 or lateral-play between the pin 30 and slot 32 would permit the ribbon to be moved 4.5 upward beyond its normal position owing to its momentum when the parts are oper-- fated very rapidly, 'printed character sion through the lower *oler band, It will ou also be observedthat the stop on thel vibra- I ter lever serves to limit the movement of A'fthe'universal bar 20.` v"lli/ 'itliout such stop, l Ithe universal bar is sometimes moved back- .vvard by its 'momentum beyond the point 55 "towhich it is positivelyoperated by the type bar, this also resulting` ian overthrow of the ribbon, but wheiithe stops are inengagernent any force" tending 4to Amove .the universal bar backwardreaets through' the so lot and pin connectionto produce acounieracting forward pressure on the universal par.

sothat a portion of vthe ator 33 engages the pin 29, as shown in Fig. e5 4, the throw oi the 'vibrator will f be mvibrator, and thus prevent overthrow, cooperating stop devices actuator 33 4band, and the bar respectively, or-v vvhic-h is 'shown as aj to a' 'bracket 'The dog 46 is piv-` to rest on the dog and ing-ly mounting the dog d6 enough to permit such result may be obtained by pivoting' the stop would receive its impresv I the printing position of theribbon it the key 3'? is depressed so that the actul racimo creased suliciently to bring the'lower color band over the printing point when a type bar is actuated. v vibrator leverV 26 brings the shoulder or stop into position to engage the dog 46. As the 'throw ofthe lever 26 in this inthe universal bar than inthe Fig. 34 adjust- This increased throw 'of the i 'stance greater lfor a given movement of ment, the irst stop 'a is carried above the position shown in Fig'. 3 before2 the stop-46 has moved back far enoughto engage it.

-Rcferring to Fig.' 5, when thev shift key has lbeen operated tolift the -platen to upper ease-position, .the vibrator Alever is car- 'so rled up with it, and the actuator being adljusted for the upper color. band, as in Fig.`

3, the third `stop or-shoulder c is brought linto positionto engage the dog liti. lf the is shifted 'forl the vlower color.` platen is in upper Vease position (Fig. 6), the fourth stop brought against bar is actuated. .The purpose or Fig.

1s as follows.: ln ra id o eration" when the platen has been shifted to upper"- case position, the shift hey is sometimes released permitting the. platen to drop or commence its .downward movement before the type bar has had time to the platen. If the dogglr 46 werev rigid with the universal bar, such operation would'permit the shoulder 50 between the stops c and ythereby prevent lower case' posidog t6 bearing' the return of the platen to tion. ln other words, the

move away from o d will be the 'dog '46 whena `type pivoting the dog d6, See

againstthe shoulder v5() would hold both the vibrator lever and the platen up. By yieldas shown, it can permitthe-v stop to parts can returnto" rihe' spring 49 is weak operation. The saine readily swing 'down t slip. vpast so that the normal. position.

45, in which case the stop 46 could be rigid withv itsl support. Variations ma y scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I

velaiin :4

, 1.,: in va typewritingmachiuepthe vcombi-l nation vwith a ribbon vibrator having a stop,

beresorted to within the I and pre'-l v.

of the ribbon, a shiftable device tol vary the printing position ci the ribbon and prevent the engagement oi said st/ops, and a second iso inv mechanism, ot stops,

shiftable device tor varying the printing tion with a ribbon vibrator i said variable member stop engageable by said counter-stop to pi'cvent. overthrow of the ribbon after the.' operation of said shittablc device 3. The combination with a ribbon vibrata counter-stop, a

position of the ribbon, and means controlled by said shiftablc device tor ivleteriiiining which of said stops shall cooperate with said counter-stop.

et. In a typewriting machine, a ribbon vibratinpr mechanism includingY men'ibcrs movable at each type stroke and which assume diii'erent relationships to each other at. the completion ot the printing stroke when the ribbon oecupes ditlercnt positions ove-r the printinl point. and coi'icrating stops upon said members' brought together in different relative positions for arresting the ribbon vibrator.

In a typcwriting machine, the combinaor`holdei'. ot key-controlled mechanisiir tor vibrating' the same, said key controlled mechanism ineluding a member which has' a uniform movement and one which hasl a variable movement to vary the position occupied by the ribbon over the printing point, and stop devices Cooperating with said members for preventing overthrow of the ribbon' beyond either of its printing positions; said stop devices includingone which is effective when has relatively slow movement, and ineffective when it has relatively quick movement, and also including' another stop which is ineffective in the tirst instance and effective in the second.

(i. In a typewi'iting' machine, the combination with a ribbon vibrator or holder, otkey controlled mechanism for vibrating' thc same, said key-controlled mechanism including both a member: which has a uniform movement `and also a member which has a variable movement to vary the position occupied bythe ribbon over the printing,r point; and stop devices including` aseries ot stops on Lone of said members on the other ot said members; including one. which engages the counter stopvwhen the ribbon-vibrating member is moving at relatively slow speed, but which misses said counter-stop when said ribbonvibrating member is moving at relatively high speed, and also including,r a second stop w.lii ,'li.eii;iacs said counter-stop when said ribbon vibrating member is moving' at relai tively high speed. l

'7. ln a typewritnig inacine,'the coinbniation with a' ribbon vibrator and a counter-stop` said series" 4 counter-stop,

lit-

ovcrthrow ot the ribbon vibrator in its C 'livrent printing' positions; said stops includ-- 'me' both a counter-stop on one of said mem.-

i bers and also stops on another ot' said members- '.ii'ranc'cd to selectively engage said vaccording to the relative speeds tor which said members are set by said shii'itable device.

a. The combination with a ribbonvibra .tor or holder, ot vibrating meansincluding l t i l i i l l l i t or holder. ot",

means for vibrating' thev same at the type i strokes, said vibrating' means includinfl two i members relatively speed ot' said members for thi; pur-p0se ot varying the printing position oi' the. ribbon, and coH movable; a shit'table dei -vice for varying'the relative a ref-iprocatin;v member and a lever vibrated thereby: a shittable device tor varying the relative speed ot' said lever and reciprocatinf.'y mea'iber. and 'operatingi` stops oii said lever and reciprocating member to preventv overthrow ot the ribbon vibiiitor: said stops including; both a counter-stop and stops arranged to alternatively engage said counterstop, according to the. relative speeds for which said lever and reciprocating` member are set by said shittalile device.

.l. ln a typt-writing' machine having a case-shift mechanism, the combination with a ribbon vibrator or holder, of key-controlled mcchanisii'i for vibratingthe same, said key-controlled' mechanism connected to' the case-shift mechanism to bc shifted therewith, and inoludiiift,T both a member which has a uniform movement and also a. member which has a variable movement to vary the position occupied by the ribbon over the printingV point in each of the positions to which the ribbon mechanisn'i is shifted by the case-shift mechanism; and stop devices incl uding; both two sets of stops and a coun' ter-stop device; one of said sets arranged to come into play at one position ot the cascshit't mechanism, and the other of said sets arranged to comeinto play at the other position ot" said case-shift mechanism; each o? saial sets including' a stop which engages tne counter-stop device when the ribbon-vibrating' member is moving` at relatively slow speed. but. which misses 'said counter-stop device when said ribbon-vibratint; member is moving at relatively high speed, and also incl udine,- a second stop which engages said counter-stop device when said ribbon-vibratingmember is moving at relatively high speed.

ttl. ln a tvpcwriting machine having a case-shift mechanisn'i. the con'ibinat-ion with a ribbon-vibrating mechanism connected to said case-shiftl mechanism, and a ribbonshift mechanism for bringing different' widthwise portions ot' the ribbon into play` ot tom' stops, and a counter-stop arranged to arrest the' ribbon-vibratingr mechanism at the. conclusion of thc. printing' stroke with the ribbon in tivo ditierent positions over the printing point, in each position of the case-shiftmechanism,

l1.` In a typewriting machine.v the combi-` nation ot a universal bar, ribbon vibrating meohanism actuated thereby, and coperatingstops on saifl bar and mechanism limiting the relative movement of said parts.

l2. In a typewriting machine, the combination with a universal bar, of a. ribbon vibrator, a stop on the vibrator, and a sto onl the universal bar in the path of saiil firstnamed stop, said stops brought together at each type stroleto stop the movement of the vibrator and universal bar.

13. ln a typewriting machine., the combination ot a. type bar, a. 4universal bar afctuated thereby, a. ribbon vibrator, and stops oii saidl universal bar and vibrator in position to be brought togethei` antl stop the relative movement -of the universal 'bar unil vibrator when the type bai' is in printing position.

14. In a typewriting machine, the eombination 4with a type bar, of a universal bar .operated therebv` a vibrator lever operated by the universal bar, a stop carried by said lever, and a cooperating stop on tbe univer- `.ral bar to limit the movement of the vibrator lever anrl universal bar. v

15. In a typewritiugr machine, the combii nation with a tifpel bar anrl a universal bai' operated thereby, of aribbon vibrator operated by the universal bar, anfl cooperating stops moved by the universal bar and vibral tor into anfl out o't contact antl stopping the movement ot the saifl lever and universal bar.

1U. ln a typewritingf 'inafhinm the combi nation with -a universal'bar. ot a ribbon vii bratoiactuated tlierebx.' anfl stops inoverl by the universal bar aiifl vibrator into abu Contact to stop the universal tor anfl vthereby prevent overthrow ot the vibrator. l Y l?, ln a. typewritng machine, the combination with riecl forward during' the printing stroke, anil a cooperating' stop on the universal bar.

18. ln a typewriting machine. the combination lower easepositions, of a vibrator lever shittkable up and Clown with thc platen, aimiversal bar, an operating connection between said bar and lever. a stop on said bar, and cooperating stops on the vibrator lever adapted to cooperate respectively with said' 'first-namedstop when 'the' platen is in lower and upper casey positions.

' '19. l'. Ythe eambination with a platen'shiftable to lippe, and lower case positions, oi a ribbon vibrator comprising a vibrator lever `shiftable with the platen, a universal bar, `an

operating connection between said bar anti .lever,x a stop on said bar, a stop on the lever to engage the stop on said bar when the lattft-ingT bar antl` vibra- La tront-strilte'type bai', a uni-A versal bar'niovetl rearward by the type bar. a ribbon vibrator lever, connections between t said Alever and the universal bar i'or op-yv erating the lever. a stop on saivl lever oar witha platen shittable to upper and Y a front-strike typewriting machine,-

nation with a universal bar, of a, vibrator, operating connections between said bar and l vibrator, means to vary. the throw of the vibrator, type bars lto actuate the universal bar, a stop oii the universal bar, a: coperating stop carried by the vibrator to Contact with the .first stop when a type bar' is inl irintiiio 'osition D f and another stop carried by the vibrator in position to Contact with the iirstmamed stop when a type bar is in printing' position when said. connections have been shittecl to vary the throw of the vibrator.

22. ln a typewriting machine, the combination with a platen shittable to upper and lower oase positions, front-strike type-bars, a universal bar operated by the type bars, a ribbon vibrator lever shittable up and down with the platen, operating connections betweeiifthe vibrator lever and the universal l bar, means to slii'ttsairl connections to vary l the throw ot the vibrator lever, a. stop carY l i'ieel by the universal bar, :intl a series ot eo ,l operating: stops earrieel by the vibrator lever I unil. positioned to correspond to the aetuattvl l positions'ot the vibrator lever resulting from i' the shitting' oit the lever up :incl clown with the platen and the variation in the throw of the lever.

9?. ln n tvpewritiupr machine, the Combination with a type bar, ot a universal bar artua'lerl thereby` a Istop pivotecl to the universal bara ribbon vibrator aetuaterl by the v universal har. a nti a st op earrierl thereby :unl ,f cooperatingY with saivl pivoted stop.

Q4. Tn a` typewritiunmachine, the Pombil nation with a platenshittable up and Clown, oi' a ribbon vibrator shittable with the l blaten. a universal bai', a stop earrierl theref by. a series ot' cooperating stops on the vibrator, and means to permit the stops to pass eaoli other when the platen returns from shifted position.

25. ln a typewriting machine, the nation with a tvpe bar` of a` universal lbar actuatedthereby, a. ribbon vibrator actuated' by the universal bar'` and a stop earrieggl by saiil vibrator to limit the movement oit the l universal bar.A f 9.6. lu a typewiiting machine, the combi nation with a type bar, ot a universal bar g actuated thereby, a ribbon vibrator, anni col i l 'n 21. .ln a typewriting machine, the Crombi-v coinbi a depending arm, a stop carried thereby,-

operating stops carried byrtlie universal bar l operating stops on said member and uniand vibrator and operative to limit thel throw of the vibrator and the movement of the universal bar.

nat-ion with type bars, of a universal bar operate-d thereby, a ribbon vibrator, operat ing connections between the vibrator and the universal bar, andsto'ps carried by the universal bar and vibrator and brought together at the completion of a type stroke, and thereby positively stopping both t-he universal bar and vibrator.

28. In a typewriting machine, the combination of4 a universal bar, a ribbon vibrator lever, a connection between the lever and universal bar at one side lof the lever fulcrum, a stop carried by the lever on the opposite side of its fulcrum, and a coperating stop onlthe universal bar.

29. In a typewriting machine, the combii nation with front-strike type bars, of a universal bar moved rearwardly by the type bars when the latter are brought to printing position, a ribbon vibrator comprising a lever having an arm extending -above its pivot, an operating connection between said arm and the universal bar, said lever having and a stop on the universal bar in the path of the first-named stop.

30. In a typewriting machine, the combination with type bars, of a universal bar moved rearwardly by the operation of the versal bar.

3l. In a typewriting machine having a case shift mechanism. the combination with 27. In a typewritmg machine, the combiribbon vibrating mechanism carried by the case shift mechanism :and movable up and type bars, ribbon-vibrating mechanism opi erated by the universal bar and comprising a member moved forwardly during the rearward movement of the universal bar, and codown therewith, stops on said vibrating mechanism and a counter-stop arranged to 'engage said tiret-named stops and arrest the ribbon vibrating mechanism when the case shift mechanism is in either position.

32. In a typewriting machine, the combination of a ribbon vibrator, a universal bar operated at each type stroke, connections between said bar and the ribbon vibrator for vibrating the latter at'each type stroke, and stops carried by the universal bar and said vibrator, each stop moving toward the other during a type stroke and brought int-o engagement when the ribbon is over the printing point.

In a typewriting machine, the combination with a case shift mechanism, ribbon vibrator carried thereby and movable up and down therewith, a universal bar voperated atreach type stroke, connections between said bar and the ribbon vibrator for vibrating the latter at each type stroke, and

vstops carried by the universal bar andsaid vibrator, each stop moving toward the other i during a type stroke and brought into engagement when the ribbon is over the printing point.

VILLIAM L. GUMPRICCHI.

Titiiessesz A W. L. Druck, lt. Jv. Fooits. 

